SUNGOLD LABOR DAY SALE · CALL : 877-556-3347 FOR SPECIAL PRICING

SUNGOLD LABOR DAY SALE · CALL : 877-556-3347 FOR SPECIAL PRICING

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BLUETTI B300K Expansion Battery | 2,764.8Wh

BY: Bluetti
SKU: P-B300K2-UN-GY-BL-ID-010
| Availability: In stock
$1,199.00

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Shipping & Easy Returns

Shipping is free across the Lower 48. No fuel surcharges, no residential fees, and no liftgate charge on freight orders. The price you see is the price you pay. Read our full Shipping Policy here.

Most orders leave the warehouse in 1 to 2 business days and arrive within 3 to 10 business days. We send tracking the moment it ships.

Anything that ships on a pallet goes freight with liftgate and pallet jack included, so the driver gets it off the truck and onto the ground at your address. The carrier will call you directly to schedule a delivery window.

Returns are 30 days from delivery. For freight deliveries, inspect the shipment before you sign for it. If something is damaged in transit, note it on the delivery receipt and we handle the freight claim, not you. Read more about our Returns Policy here.

Why Buy From Us

Buying solar online should not mean guessing your way through the install. Here’s what you get with Off-Grid Source.

  • We size the system, not just sell it. Call before you order and a sales engineer will check the kit against your actual loads, tell you if you’re buying too much or too little, and list the site-specific parts your install will need.

  • A+ rated by the Better Business Bureau. Another trust signal that you’re buying from a real company that stands behind the sale.

  • Free shipping across the Lower 48. No hidden freight charges, residential fees, or liftgate surprises at checkout.

  • Guaranteed best prices. Find the same product for less elsewhere and we’ll match it.

  • 30-day easy returns. If it is not the right fit, we’ll help you get it sent back.

  • A real person on the phone. Product questions, sizing, install planning, warranty help: call us at +1 (877) 556-3347.
  • 5 stars: 10 (83%)
  • 4 stars: 2 (17%)
  • 3 stars: 0 (0%)
  • 2 stars: 0 (0%)
  • 1 star: 0 (0%)
G
Gary W.
Great Product, Great Price!

We are pleased to add to our Bluetti collection of quality products. Our Cabin and Farm are all powered with Bluetti systems.

A
Andy D.
powerfull

ultra power bank. a must have in live

M
Michael D.
Best solar generator for off grid.

We can’t get line power at our camp so we purchased 3 b300 batteries and 1 ac 300. We only run our gas generator every 4 days for 3 hours. We went from 10 gallons of gas per week to 4 gallons of gas. The unit runs our well pump, lights , on demand hot water and microwave.

J
Jeff K.
Zero Problems!

Packaging Superb! Arrived Early!

C
Christopher C.
Must own for Homesteading

I’m a full time homesteader, I own a pair of these batteries and I have had zero issue. They work with my AC200Max and AC300, a lot of power, they power my entire living space, 365 days a year.

J
John W.
Power

will support and aid with all I have.

R
Ralph F.
Great product

Love that the batteries are seperate

J
Joel W.
Great expansion battery for AC300

Added second battery to my AC300/B300 combo for a great home backup system

J
Justin P.
Addictive

I have a ac200 max that I use the b300 with. Works flawless and simple to hook up. The extra 3072 wh is awesome to have. Watch out bluetti's can be addictive. Thought the ac200max would be enough it wasn't so added a b300 that will be enough. It is enough but why am I still trying to justify another b300???

J
James K.
Love my Bluetti Setup

Best LiFEPO4 batteries on the Market

T
Tim B.
More Reserves!

You know them, you love them, but both you & I know how danged expensive they are! I now have 12kWh worth of battery storage and I’ve maxed out what my AC300 and 2.4kW solar array can handle in a single day of Winter sunshine. I’m now not quite filling my batteries everyday which is exactly what I wanted!

J
Jay William W.
Centeral location for information needed.

It would be helpful to have a central location for information. I am learning the ropes..the hard way.
I have a home system of AC500 plus B300S batteries. I wanted to add two more batteries. I saw a promo but didn't realize
that B300 is not the same as B300S batteries
So now with extra cost to return them and order the correct ones..

Why Choose Off Grid Source

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FAST & FREE SHIPPING

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30-DAYS EASY RETURNS

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GUARANTEED BEST PRICES

GUARANTEED BEST PRICES

Find a Better Price? We’ll Match It.

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GREAT CUSTOMER SERVICE

GREAT CUSTOMER SERVICE

Our Customers Tell It Better Than We Do

Excellent 4.9/5

Trusted By 10,000+ Customers. See All Reviews.

They Stood By Me

I was a DIY solar power wannabe... that is 'til I connected with Manny... The man's a prince! He not only knows his stuff; he walked me through all things electrical. To make sure I had all I needed... he gave me his cell phone # to text him anytime I got confused... nights and weekends included. The prices were very competitive... definitely go with Manny -- you won't go wrong!

Bruce D.

Awesome Service!

I am always hesitant to buy things at places I have never shopped... I want to give a shout out to Manny who with great patience and knowledge helped me get my orders... I felt valued as a customer and I will definitely be back in the future. I highly recommend them, they make you feel like family.

Jennene A.

Real Person, Honest Service.

I'm about to go off grid. I called Manny, he walked me through everything so I could truly understand what I needed and never tried to upsell me. He was honest and made a customer for life.

Ray B.

Easy Return

I would personally like to thank Manny... I purchased the inverter and decided I needed to return it... Manny was very understanding and went out of his way to help me return the product and not even have to pay for shipping return. He gives this company reputation, honor and quality customer service!

Roger V.

Totally Off Grid.

I have been talking with Manny the owner... He has not only helped me design a system but he's been assisting with the install and components. I am super pleased so far with the assistance.

Jeff S.

Great Product! Fast Shipping

We added 2 more batteries to our current set up. Pleased with the customer service from Off-Grid Source! Will be back!

Jason

Excellent Customer Service

Very fast response times. Very professional. I highly recommend!

Ray W.